Improvement in elevators



NITED STATES 1Drrrfisnv'rl OFFICE.

HENRY H. BLAKE, OF SVEWICKLY, PENNSYLVANIA. 1

l'wlrnrzovlzlvnaNT IN ELEvAToRs.

Specification forming part of Letters Patent No. 156,329, dated October 27, 1874; application filed Pseptember 23,1874.

`To all whom it may concern:

-Be itknownthat I, -H. H. BLAKE, of Sewickly, in the countyof Allegheny and State oflPennsylvania, have invented certain new andfuseful Improvements in Elevators, and I do hereby declarel the following to be a full,

clear, and exact description of the invention, such as will enable others skilled in the art to which it lpertains to make and use it, reference ance the weight of the other, and thus the ascent of lone be inuenced or effectedlhrough the descent of the other, and vice versa.

The'fnovelty of this invention consists in,

irst, the combination, with an elevator, of rolling weights to counterbalance the load; and, secondly, the combination, with the elevatorplatforms and with the building-floors, of coinciding boxes for the reception and disposal of the weights, all as hereinafter fully described.

Referring to the accompanying drawings, A designates the frame-work of a passenger-ele vator, having the .two Aplatforms B B connect ed together and sustained by a cord or chain, C, passing over and around a grooved drum or wheel, l), located at the top of the elevator. D D are the platform-guides, and E E the propelling-cords, which are connected at their lower ends to a bell-crank or rocking plate, F, and at their upper ends each to a spring-dog, g, engaging with notches g in the rim of the wheel D. F1 F2 designate narrow boxes arranged, respectively, upon the platforms B B and the lioors or landing-places G. These boxes are so disposed that the box of each platform will coincide with each oor-box adjacent thereto as the platforms ascend and descend., The approximate ends of the coincid- `ing boxes are open for the passage of rolling weights H, whose powers are indicated upon Vplatforms and rolls therefrom his approximate weight-say, one hundred and fifty pounds. The platforms then contain equal loads, as before, and the passenger may ascend or descend by drawing upon the propellingcord in the proper direction. Leaving the platform at the end of his journey, the incumbent replaces his approximate weight and leaves the elevator 1n proper condition for another passenger.

I have described specifically means for the employment .of rolling weights, but I regard sliding weights as ytheir substantial equivalents.

I do not claim, broadly, the combination with an elevator of transferable Weights, as I am Well aware that chains have been used for the purpose of regulating the relative character of the power, weight, and loadas shown, for instance, in Patents Nos. 109,331 and. 125,064.

Having described my invention, I claim- 1. The combination, with an elevator, of Aa rolling weight or Weights, for the purpose of regulating the relative Weight of the load and power, substantially as described.

2. The elevator-boxes B B', provided with the boxes F1 F1 to receive the rolling weights, in combination with the floors F2, provided with similar receptacles, constructed to regis ter with those upon the elevator, as and for the purpose set forth.

In testimony that I claim the foregoing I have hereunto set my hand this 29th day of August, 1874,.

HENRY H. BLAKE. 

